214 T. C. CHAMEERLIN THE GREATER EARTH 



distance between these needs to be multiplied 125 times to be in proper 

 proportion. 



It is of no little importance in dynamic studies to keep ever in mind 

 that the earth's sphere of control not only revolves within the sphere of 

 control of the sun, but that its position is deep within it. The sun's 

 sphere of control extends at least several hundred times as far beyond the 

 earth as the earth is from the sun. Its precise extent has not been deter- 

 mined ; indeed, is not determinable at present, from lack of sufficient 

 data respecting competitive attractions outside. I have, however, en- 

 deavored to reach an approximate notion of its extent by projecting 

 graphically certain dynamic indications of its extent found in the outer 

 planets. These imply that the radius of the sphere of control of the sun 



DIAGRAM I 



I 



5colc about 396,800,000.000,000 



Figure 1. — Diagram, iUiistrafing general Relations of Sphere of Control of Earth to Sun 



E., earth ; O. M., orbit of moon ; E. S. C, earth's sphere of control. Scale of sun and 

 E. S. C. the same ; scale of distance between them 1/125. Gegenschein, according to 

 Moulton, lies just outside oval E. S. C. on right. 



may be of the order of 700 astronomical units — that is, 700 times the 

 distance of the earth from the sun — but the liability to error in this ex- 

 trapolation is large. The dynamic earth thus revolves deep within a 

 dynamic sphere much more extensive and much more powerful than it- 

 self. Because of this overcontrol, all problems that bring these competi- 

 tive factors into play must be worked out in the light of this relationship. 

 Even more than this, I find it helpful to picture the whole of cosmic 

 space as stressed by the gravity pulls that make up the spheres of control 

 of all the celestial host, not only considered separately, but in their nat- 

 ural groupings. As all the celestial bodies- are in motion, it is necessary 

 to think of these spheres of control as shifting in extent, form, and force 

 as they change their positions relative to one another. 



Neither the problem of the earth's genesis nor that of its atmosphere 

 can be discussed trustworthily without due consideration of the stress- 

 environment under which the greater earth had its origin and has had 



